A full wave rectifier circuit consists of two \(\mathrm{p\text-n}\) junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?
1. load resistance 2. a centre-tapped transformer
3. \(\mathrm{p\text-n}\) junction diodes 4. capacitor
Subtopic:  Rectifier |
From NCERT
NEET - 2023
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Given below are two statements:
Statement I: Photovoltaic devices can convert optical radiation into electricity.
Statement II: Zener diode is designed to operate under reverse bias in breakdown.

In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
Subtopic:  Applications of PN junction |
 68%
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For the following logic gate, the truth table is: 
       
1.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
0 0 0
0 1 0
1 0 0
1 1 1
2.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
0 0 1
0 1 1
1 0 1
1 1 0
3.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
0 0 0
0 1 1
1 0 1
1 1 1
4.
\(\mathrm A\) \(\mathrm B\) \(\mathrm C\)
0 0 1
0 1 0
1 0 1
1 1 0
Subtopic:  Logic gates |
 61%
From NCERT
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The given circuit is equivalent to:
        
1. 2.
3. 4.
Subtopic:  Logic gates |
 60%
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A \(\mathrm{p} \text-\)type extrinsic semiconductor is obtained when Germanium is doped with:
1. antimony 2. phosphorous
3. arsenic 4. boron
Subtopic:  Types of Semiconductors |
 71%
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In half-wave rectification, if the input frequency is \(60\) Hz, then the output frequency would be:
1. \(120\) Hz
2. zero
3. \(30\) Hz
4. \(60\) Hz
Subtopic:  Rectifier |
 61%
From NCERT
NEET - 2022
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As the temperature increases, the electrical resistance:
1. decreases for conductors but increases for semiconductors
2. increases for both conductors and semiconductors
3. decreases for both conductors and semiconductors
4. increases for conductors but decreases for semiconductors
Subtopic:  Energy Band theory |
 72%
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In the given circuits (a), (b) and (c), the potential drop across the two \({p\text-n}\) junctions are equal in: 
        
1. both circuits (a) and (c)
2. circuit (a) only
3. circuit (b) only
4. circuit (c) only
Subtopic:  PN junction |
 65%
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The truth table for the given logic circuit is:
1.
A B C
0 0 0
0 1 1
1 0 0
1 1 1
2.
A B C
0 0 0
0 1 1
1 0 1
1 1 0
3.
A B C
0 0 1
0 1 0
1 0 0
1 1 1
4.
A B C
0 0 1
0 1 0
1 0 1
1 1 0
Subtopic:  Logic gates |
 58%
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The output of the logic circuit shown is equivalent to a/an:
        
1. \(\mathrm{OR}\) gate
2. \(\mathrm{NOR}\) gate
3. \(\mathrm{AND}\) gate
4. \(\mathrm{NAND}\) gate

Subtopic:  Logic gates |
 69%
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